A049248 Smallest nonnegative value taken on by 9x^2 - ny^2 for an infinite number of integer pairs (x, y).

0, 1, 6, 0, 1, 3, 2, 1, 0, 9, 9, 9, 9, 1, 9, 0, 1, 9, 5, 1, 9, 9, 1, 9, 0, 1, 9, 8, 1, 6, 2, 4, 3, 2, 1, 0, 9, 9, 9, 9, 1, 9, 9, 9, 9, 2, 1, 9, 0, 1, 9, 9, 1, 9, 5, 1, 9, 9, 9, 9, 5, 1, 9, 0, 1, 9, 9, 1, 3, 9, 1, 9, 8, 1, 6, 5, 1, 3, 2, 1, 0, 9, 9, 9, 9, 9, 9, 9, 1, 9, 9, 4, 9, 2, 1, 9, 8, 1, 9, 0, 1, 9, 2, 1, 9